Modified showinvoice.php to display information for business invoices.
First steps towards objectification of the code. Implementing the classes that will be used to rewrite the rest of the pages.
Begun implementing the objectification process by rewriting all the show*.php pages to use the new system. Also upgraded editinvoice.php to allow for separately taxable items.
Fixed editinvoice.php to use the checkbox properly.
Ignore this commit...
Implemented objectification, and modified showXXX.php files.
Merge branch 'invoices'

Conflicts:
	editinvoice.php
	showbusiness.php
	showcontact.php
	showinvoice.php
	showtask.php

Signed-off-by: Desmond Duval <haydre@gmail.com>